sub-

Front

subconscious

Back

not fully aware; occurring below your level of thinking and awareness

Front

subway

Back

a passageway under the ground; an electric underground railway

Front

subcutaneous

Back

under the skin

Front

subordinate

Back

a person under someone else in rank or importance

Front

submerge

Back

to put under water

Front

subdue

Back

to bring under control

Front

submarine

Back

a watercraft that stays underwater

Front

subfreezing

Back

below freezing point

Front

subject (verb)

Back

to put under someone else's control

Front

subirrigate

Back

to water from below ground